Corsair liquid cooler installation questions

So I bought a Corsair H60 and got it installed last night. I haven't powered on the system yet, but do have some lingering concerns. This is my first liquid cooled system.

I have the barbs on the pump unit facing upwards, as that position was most accomodating for the tubes in the space I had. In hindsight, could that be a problem (i.e. water having to be pumped upwards against gravity)?

The barbs are also pretty close to a set of heatsinks around the CPU socket. Motherboard is an Asus Maximus Gene V. I imagine these heatsinks will get hot. Again, could this be problematic (i.e. the liquid getting heated up more than it shoul be)?

I'm not sure why you think this would be any more of a problem than with a normal air cooling setup?

The "pump" in the system is really a "circulator" because it is moving liquid in a circle, rather than from one place to another. So the fluid it is "pushing" up hill is also being "pulled" by the fluid that's "falling" downhill. Essentially, don't worry about it, it'll be fine

The only possible concern I could think of would be if the tubes were in direct contact with a heatsink, in which case over time the tubing material could conceivably be weakened, depending on what they were made of. If it was silicone rubber, then this wouldn't be a problem, and no matter what the tubes are made from, as long as they're not actually touching any heatsinks, you'll be fine; and even if they were touching, it's still pretty unlikely you'd actually have any issues.

What you do need to make sure of is that the water block / pump assembly is properly attached to the CPU. I'm sure you've followed the instructions and tightened all the bolts etc in the required fashion, so you ought to be A-OK there, too.

If I may hijack a thread (sorry) real quick, I've got a different situation with a similar system that I'd like some input on. I've got a Silverstone Raven 2 case where the motherboard is rotated to put the back panel up.

I'm looking at getting the NZXT Kraken X60 for my system, and while I have the space (barely) between the video cards and the fans to get the radiator, this mounting position puts the radiator barbs facing up to the block. With the water block being the highest point in the loop, am I going to have problems with an air bubble in there or pumping issues of any kind?

asking a silly question here, but since you're just chilling your CPU, do you *need* that big of a radiator? Maybe a smaller one, and exhaust it out the back, or is that where the PSU goes?

Unfortunately the 120mm fan spot in the top of the case is juuuuust big enough to mount the fan, I can't fit radiator in there. The other factor is that the bottom fans are already 140mm so I want to keep the existing mounts and I need that airflow to cool the GPU's (yes, multiple).